lmhmfgima - Mathbox for Stefan O'Rear

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Theorem lmhmfgima 42573

Description: A homomorphism maps finitely generated submodules to finitely generated submodules. (Contributed by Stefan O'Rear, 24-Jan-2015.)

**Hypotheses**
Ref	Expression
lmhmfgima.y	⊢ 𝑌 = (𝑇 ↾_s (𝐹 “ 𝐴))
lmhmfgima.x	⊢ 𝑋 = (𝑆 ↾_s 𝐴)
lmhmfgima.u	⊢ 𝑈 = (LSubSp‘𝑆)
lmhmfgima.xf	⊢ (𝜑 → 𝑋 ∈ LFinGen)
lmhmfgima.a	⊢ (𝜑 → 𝐴 ∈ 𝑈)
lmhmfgima.f	⊢ (𝜑 → 𝐹 ∈ (𝑆 LMHom 𝑇))

**Assertion**
Ref	Expression
lmhmfgima	⊢ (𝜑 → 𝑌 ∈ LFinGen)

Proof of Theorem lmhmfgima Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		lmhmfgima.y	. 2 ⊢ 𝑌 = (𝑇 ↾_s (𝐹 “ 𝐴))
2		lmhmfgima.xf	. . . 4 ⊢ (𝜑 → 𝑋 ∈ LFinGen)
3		lmhmfgima.f	. . . . . 6 ⊢ (𝜑 → 𝐹 ∈ (𝑆 LMHom 𝑇))
4		lmhmlmod1 20922	. . . . . 6 ⊢ (𝐹 ∈ (𝑆 LMHom 𝑇) → 𝑆 ∈ LMod)
5	3, 4	syl 17	. . . . 5 ⊢ (𝜑 → 𝑆 ∈ LMod)
6		lmhmfgima.a	. . . . 5 ⊢ (𝜑 → 𝐴 ∈ 𝑈)
7		lmhmfgima.x	. . . . . 6 ⊢ 𝑋 = (𝑆 ↾_s 𝐴)
8		lmhmfgima.u	. . . . . 6 ⊢ 𝑈 = (LSubSp‘𝑆)
9		eqid 2725	. . . . . 6 ⊢ (LSpan‘𝑆) = (LSpan‘𝑆)
10		eqid 2725	. . . . . 6 ⊢ (Base‘𝑆) = (Base‘𝑆)
11	7, 8, 9, 10	islssfg2 42560	. . . . 5 ⊢ ((𝑆 ∈ LMod ∧ 𝐴 ∈ 𝑈) → (𝑋 ∈ LFinGen ↔ ∃𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)((LSpan‘𝑆)‘𝑥) = 𝐴))
12	5, 6, 11	syl2anc 582	. . . 4 ⊢ (𝜑 → (𝑋 ∈ LFinGen ↔ ∃𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)((LSpan‘𝑆)‘𝑥) = 𝐴))
13	2, 12	mpbid 231	. . 3 ⊢ (𝜑 → ∃𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)((LSpan‘𝑆)‘𝑥) = 𝐴)
14		inss1 4223	. . . . . . . . . 10 ⊢ (𝒫 (Base‘𝑆) ∩ Fin) ⊆ 𝒫 (Base‘𝑆)
15	14	sseli 3968	. . . . . . . . 9 ⊢ (𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin) → 𝑥 ∈ 𝒫 (Base‘𝑆))
16	15	elpwid 4607	. . . . . . . 8 ⊢ (𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin) → 𝑥 ⊆ (Base‘𝑆))
17		eqid 2725	. . . . . . . . 9 ⊢ (LSpan‘𝑇) = (LSpan‘𝑇)
18	10, 9, 17	lmhmlsp 20938	. . . . . . . 8 ⊢ ((𝐹 ∈ (𝑆 LMHom 𝑇) ∧ 𝑥 ⊆ (Base‘𝑆)) → (𝐹 “ ((LSpan‘𝑆)‘𝑥)) = ((LSpan‘𝑇)‘(𝐹 “ 𝑥)))
19	3, 16, 18	syl2an 594	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → (𝐹 “ ((LSpan‘𝑆)‘𝑥)) = ((LSpan‘𝑇)‘(𝐹 “ 𝑥)))
20	19	oveq2d 7432	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → (𝑇 ↾_s (𝐹 “ ((LSpan‘𝑆)‘𝑥))) = (𝑇 ↾_s ((LSpan‘𝑇)‘(𝐹 “ 𝑥))))
21		lmhmlmod2 20921	. . . . . . . . 9 ⊢ (𝐹 ∈ (𝑆 LMHom 𝑇) → 𝑇 ∈ LMod)
22	3, 21	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑇 ∈ LMod)
23	22	adantr 479	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → 𝑇 ∈ LMod)
24		imassrn 6069	. . . . . . . . 9 ⊢ (𝐹 “ 𝑥) ⊆ ran 𝐹
25		eqid 2725	. . . . . . . . . . . 12 ⊢ (Base‘𝑇) = (Base‘𝑇)
26	10, 25	lmhmf 20923	. . . . . . . . . . 11 ⊢ (𝐹 ∈ (𝑆 LMHom 𝑇) → 𝐹:(Base‘𝑆)⟶(Base‘𝑇))
27	3, 26	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → 𝐹:(Base‘𝑆)⟶(Base‘𝑇))
28	27	frnd 6725	. . . . . . . . 9 ⊢ (𝜑 → ran 𝐹 ⊆ (Base‘𝑇))
29	24, 28	sstrid 3984	. . . . . . . 8 ⊢ (𝜑 → (𝐹 “ 𝑥) ⊆ (Base‘𝑇))
30	29	adantr 479	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → (𝐹 “ 𝑥) ⊆ (Base‘𝑇))
31		inss2 4224	. . . . . . . . . 10 ⊢ (𝒫 (Base‘𝑆) ∩ Fin) ⊆ Fin
32	31	sseli 3968	. . . . . . . . 9 ⊢ (𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin) → 𝑥 ∈ Fin)
33	32	adantl 480	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → 𝑥 ∈ Fin)
34	27	ffund 6721	. . . . . . . . . 10 ⊢ (𝜑 → Fun 𝐹)
35	34	adantr 479	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → Fun 𝐹)
36	16	adantl 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → 𝑥 ⊆ (Base‘𝑆))
37	27	fdmd 6728	. . . . . . . . . . 11 ⊢ (𝜑 → dom 𝐹 = (Base‘𝑆))
38	37	adantr 479	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → dom 𝐹 = (Base‘𝑆))
39	36, 38	sseqtrrd 4014	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → 𝑥 ⊆ dom 𝐹)
40		fores 6816	. . . . . . . . 9 ⊢ ((Fun 𝐹 ∧ 𝑥 ⊆ dom 𝐹) → (𝐹 ↾ 𝑥):𝑥–onto→(𝐹 “ 𝑥))
41	35, 39, 40	syl2anc 582	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → (𝐹 ↾ 𝑥):𝑥–onto→(𝐹 “ 𝑥))
42		fofi 9362	. . . . . . . 8 ⊢ ((𝑥 ∈ Fin ∧ (𝐹 ↾ 𝑥):𝑥–onto→(𝐹 “ 𝑥)) → (𝐹 “ 𝑥) ∈ Fin)
43	33, 41, 42	syl2anc 582	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → (𝐹 “ 𝑥) ∈ Fin)
44		eqid 2725	. . . . . . . 8 ⊢ (𝑇 ↾_s ((LSpan‘𝑇)‘(𝐹 “ 𝑥))) = (𝑇 ↾_s ((LSpan‘𝑇)‘(𝐹 “ 𝑥)))
45	17, 25, 44	islssfgi 42561	. . . . . . 7 ⊢ ((𝑇 ∈ LMod ∧ (𝐹 “ 𝑥) ⊆ (Base‘𝑇) ∧ (𝐹 “ 𝑥) ∈ Fin) → (𝑇 ↾_s ((LSpan‘𝑇)‘(𝐹 “ 𝑥))) ∈ LFinGen)
46	23, 30, 43, 45	syl3anc 1368	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → (𝑇 ↾_s ((LSpan‘𝑇)‘(𝐹 “ 𝑥))) ∈ LFinGen)
47	20, 46	eqeltrd 2825	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → (𝑇 ↾_s (𝐹 “ ((LSpan‘𝑆)‘𝑥))) ∈ LFinGen)
48		imaeq2 6054	. . . . . . 7 ⊢ (((LSpan‘𝑆)‘𝑥) = 𝐴 → (𝐹 “ ((LSpan‘𝑆)‘𝑥)) = (𝐹 “ 𝐴))
49	48	oveq2d 7432	. . . . . 6 ⊢ (((LSpan‘𝑆)‘𝑥) = 𝐴 → (𝑇 ↾_s (𝐹 “ ((LSpan‘𝑆)‘𝑥))) = (𝑇 ↾_s (𝐹 “ 𝐴)))
50	49	eleq1d 2810	. . . . 5 ⊢ (((LSpan‘𝑆)‘𝑥) = 𝐴 → ((𝑇 ↾_s (𝐹 “ ((LSpan‘𝑆)‘𝑥))) ∈ LFinGen ↔ (𝑇 ↾_s (𝐹 “ 𝐴)) ∈ LFinGen))
51	47, 50	syl5ibcom 244	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)) → (((LSpan‘𝑆)‘𝑥) = 𝐴 → (𝑇 ↾_s (𝐹 “ 𝐴)) ∈ LFinGen))
52	51	rexlimdva 3145	. . 3 ⊢ (𝜑 → (∃𝑥 ∈ (𝒫 (Base‘𝑆) ∩ Fin)((LSpan‘𝑆)‘𝑥) = 𝐴 → (𝑇 ↾_s (𝐹 “ 𝐴)) ∈ LFinGen))
53	13, 52	mpd 15	. 2 ⊢ (𝜑 → (𝑇 ↾_s (𝐹 “ 𝐴)) ∈ LFinGen)
54	1, 53	eqeltrid 2829	1 ⊢ (𝜑 → 𝑌 ∈ LFinGen)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 394 = wceq 1533 ∈ wcel 2098 ∃wrex 3060 ∩ cin 3938 ⊆ wss 3939 𝒫 cpw 4598 dom cdm 5672 ran crn 5673 ↾ cres 5674 “ cima 5675 Fun wfun 6537 ⟶wf 6539 –onto→wfo 6541 ‘cfv 6543 (class class class)co 7416 Fincfn 8962 Basecbs 17179 ↾_s cress 17208 LModclmod 20747 LSubSpclss 20819 LSpanclspn 20859 LMHom clmhm 20908 LFinGenclfig 42556

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-rep 5280 ax-sep 5294 ax-nul 5301 ax-pow 5359 ax-pr 5423 ax-un 7738 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3465 df-sbc 3769 df-csb 3885 df-dif 3942 df-un 3944 df-in 3946 df-ss 3956 df-pss 3959 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-int 4945 df-iun 4993 df-br 5144 df-opab 5206 df-mpt 5227 df-tr 5261 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7372 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7869 df-1st 7991 df-2nd 7992 df-frecs 8285 df-wrecs 8316 df-recs 8390 df-rdg 8429 df-1o 8485 df-er 8723 df-en 8963 df-dom 8964 df-sdom 8965 df-fin 8966 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11476 df-neg 11477 df-nn 12243 df-2 12305 df-3 12306 df-4 12307 df-5 12308 df-6 12309 df-sets 17132 df-slot 17150 df-ndx 17162 df-base 17180 df-ress 17209 df-plusg 17245 df-sca 17248 df-vsca 17249 df-0g 17422 df-mgm 18599 df-sgrp 18678 df-mnd 18694 df-grp 18897 df-minusg 18898 df-sbg 18899 df-subg 19082 df-ghm 19172 df-mgp 20079 df-ur 20126 df-ring 20179 df-lmod 20749 df-lss 20820 df-lsp 20860 df-lmhm 20911 df-lfig 42557

This theorem is referenced by: lnmepi 42574

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